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Finding the Fourth Proportional to 55,621, 83,440.14 and 18,693.64

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Solution

The fourth proportional to 55,621, 83,440.14 and 18,693.64 is: 28,043.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,621 : 83,440.14 = 18,693.64 : x
  2. Step 2: Convert to fraction form
    55,621/83,440.14 = 18,693.64/x
  3. Step 3: Cross multiply
    55,621x = 83,440.14 × 18,693.64
  4. Step 4: Simplify right side
    55,621x = 1,559,799,938.71
  5. Step 5: Solve for x
    x = 1,559,799,938.71/55,621
  6. Step 6: Final answer
    x = 28,043.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.